There is no global tuning from 440 to 432. If you want to tune audio events see reference manual sections below.
Audio Event Transpose and Tune
The ability to transpose and fine-tune audio adds a lot of flexibility when working with audio files. For instance, if you have a keyboard loop collection in which every loop is in the key of C, being able to transpose these loops to any other key opens up many possibilities.
In Studio One, transposing and tuning are a part of the same set of advanced algorithms as timestretching, so the quality is extremely high.
To transpose any audio Event, select it and open the Inspector by pressing [F4] on the keyboard or clicking on the Inspector button above the Track Column. Then enter a value in the Transpose field, from -24 to +24 semitones.